Podcast: Snakes on the Brain, the Upside of Allergies, and the Next SARS Pandemic

Did snakes drive the evolution of the human brain? Do allergies get a bad rap? And are bats carrying the next SARS pandemic? Science's Online News Editor David Grimm chats about these stories and more with Science's Sarah Crespi.

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A 3D plot from a model of the Ebola risk faced at different West African regions over time.
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